ZhongYi Gear Manufacturer (a member of ZhongYi Machinery) | China Precision Gear & Rack Factory Since 2003
China Gearbox Components Manufacturer
Custom gears, shafts, pinions, worm sets, and matched bevel pairs for gearbox manufacturing and maintenance.
Source Factory
China Direct (2,800mยฒ Plant)
Precision Grade
DIN 4-7 / AGMA 11-13
Engineering DFM
< 24 Hours Turnaround
Quality System
ISO 9001:2015
China precision factory supplying custom transmission gears, planetary carriers, input shafts, and reducer components for OEM machine builders.
Product type
Custom gears, shafts, pinions, bevel pairs, or worm sets for gearboxes
Manufacturing basis
Buyer drawing, sample, mating parts, or gearbox interface specification
Common components
Spur gears, helical gears, integral pinion shafts, bevel gear sets, and worm gearing
Shaft features
Precision bearing seats, splines, threads, shoulders, keyways, and seal journals
Product Matrix
Browse specialized replacement series, OEM interchange families, and application-specific hydraulic gear pumps. Each product line includes complete model tables, displacement, pressure ratings, and port dimensions.
China precision factory supplying custom transmission gears, planetary carriers, input shafts, and reducer components for OEM machine builders.
China direct factory manufacturing custom speed change gears, cluster gears, and countershafts for heavy manual and powershift transmissions.
China heavy-duty gear factory manufacturing large-module forged gears, pinions, and bull gears for mining conveyors, ball mills, and oilfield drawworks.
Manufacturing capability
As a professional China gear manufacturer and direct OEM factory in Zhejiang, ZhongYi specializes in custom gearbox components from buyer drawings or reverse-engineered samples. Custom gearbox components include the gears, pinions, shafts, worm sets, bevel pairs, carriers, and related transmission parts inside a reducer or drive unit. Each enquiry is reviewed against gearbox ratio, shaft layout, center distances, bearing arrangement, housing interfaces, lubrication, load, material, heat treatment, and tolerance requirements.
Product types & variants
The final product form is confirmed from the buyer drawing, mating component, assembly layout, operating conditions, and inspection requirements.
Parallel-shaft gear components reviewed for ratio, center distance, bearing support, backlash, and lubrication.
Matched angular-drive components controlled by pair geometry, mounting distance, contact, and housing accuracy.
Reduction components selected as a material and geometry pair with thermal and lubrication conditions documented.
Integrated gear-and-shaft parts with bearing journals, splines, threads, keyways, and heat-treatment zones.
High-torque transmission cluster gears, countershaft gears, and synchronizer hubs manufactured from case-hardened alloy steels.
Forged large-module spur and helical gears for drilling mud pumps, rotary tables, cone crushers, and ball mills.
Selection & Metallurgy guidance
Provide an assembly drawing or complete interface data rather than only an isolated component. The review should connect ratio, shaft directions, center distances, bearings, housing bores, seals, lubrication, and mounting to the individual gear drawings. For a replacement component, document the failure mode: tooth breakage, pitting, scoring, bore wear, shaft bending, overheating, or lubricant contamination. Reproducing the old geometry without understanding the cause may repeat the same problem. Critical spare parts should retain revision, material, heat-treatment, and pair traceability.
Quality Control & Inspection Matrix
Overseas procurement teams require verifiable technical data, not unsupported claims. Every production batch at ZhongYi is inspected against approved CAD blueprints and international standards (DIN, AGMA, ISO).
Component-Specific Quality Focus:
ZhongYi can review gearbox components against the approved assembly and component drawings. Process controls may include material confirmation, blank and datum inspection, machining checks, heat-treatment verification, gear and shaft measurements, hardness, pair contact or backlash review, cleanliness, and final documentation when specified. The page does not claim complete gearbox performance, efficiency, noise, or life without an agreed assembly-level design and test. This distinction helps procurement teams understand exactly what is being quoted and which validation remains with the gearbox designer or assembler.
Validates 3D spatial GD&T, bore concentricity, center distance, and geometric tolerances down to ยฑ0.002 mm.
Inspects involute tooth profile error (fฮฑ), lead crowning (fฮฒ), pitch cumulative error (Fp), and radial runout (Fr).
Verifies surface hardness (58โ62 HRC), core toughness, and effective carburized / nitrided case depth gradient.
100% chemical composition verification of alloy steel forgings (20CrMnTi, 42CrMo, 18CrNiMo7-6, Stainless, POM).
We maintain strict incoming material spectroscopy, in-process CNC tooth coordinate monitoring, and 100% final pre-shipment dimensional inspection. All custom gear batches are backed by our full manufacturing warranty.
Application fit
Match the gear type with real machinery conditions, operating environment, load, speed, and replacement requirements.
Discover how this gear category meets extreme torque, low backlash, quiet operation, and weather-resistance demands in primary industry sectors:
High-torque, impact-resistant gears, girth rings, and planetary drive sets engineered for excavators, cranes, drilling rigs, and heavy mining crushers.
Low-backlash, ultra-precise fine-pitch gears, ground helical racks, and planetary gearheads for robotics, AGV wheel drives, and high-speed motion axes.
High-torque bevel gears, spur gears, and splined drive shafts for tractors, harvesters, rotary tillers, and agricultural PTO gearboxes.
Technical FAQ
These answers support early engineering and procurement review. Final dimensions, materials, tolerances, and process requirements are confirmed against the approved drawing file.
The current project information supports custom gearbox components such as gears, pinions, shafts, worm sets, and bevel pairs. A complete gearbox enquiry requires separate confirmation of housing, bearings, seals, lubrication, assembly, and testing scope.
Provide the component drawing or sample, mating parts, ratio, center distance, shaft and bearing interfaces, material, heat treatment, lubrication, failure history, quantity, and any assembly or inspection records.
Yes. Reviewing the gear pair, shafts, center distances, bearing arrangement, and housing interfaces together usually gives better technical context than evaluating each part in isolation.
Send your 2D blueprints or 3D CAD models. Our senior gear engineering team will review tooth geometry, module/pitch, materials, heat treatment feasibility, and provide transparent factory pricing within 24 hours.
Mutual NDA Protection
We sign strict Non-Disclosure Agreements to safeguard proprietary designs.
< 24h DFM Feedback
Rapid manufacturability review, tolerance checks, and unit quotation.
Direct Factory Engineering
Direct technical communication with senior master gear artisans.
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